Below is an account from one of the guests

Starting at Temple Meads station with Reggie the liveried porter to
greet us and a whole host of 1920s clad characters to meet us; we were
soon caught up in the tale of the novel’s protagonist, Harry Clifton.

Young Harry, a lad from the backstreets of Bedminster, in a mad rush
to get to his friend’s birthday party, makes off on his bicycle with the
wrong suitcase strapped to the mudguard. The case belongs to a certain
Mr Ponsonby-Jones. Ponsonby is frantic to reclaim the case containing
his wallet stuffed with white fivers. Reggie the porter gamely sprints
after the bicycle using his best porter’s run but returns puffing and
despondent moments later.

The bumpy old bus gives chase following Harry to Stillhouse Lane in
Bedminster where a bakery maid passes on the information the lad has
just been seen on his way to Billington Grange – this looked remarkably
like Ashton Court to us when we arrived, but after gin and cucumber
sandwiches had been consumed, who were we to argue?

The famous dancer Greta (never heard of her, but boy could she dance)
was found cavorting on the lawns much to the delight of a gaggle of
local children who crept ever closer to the twirling Greta but soon ran
away after several young ladies in sable wraps and cloche hats leapt
down from the bus to join in the dance.

Harry had been spotted again, cycling like the clappers, on route to
the suspension bridge; the bus creaked away climbing up through Clifton
hot on Harry’s tail. After a fruitless search with many photo
opportunities for the invited guests on the bus – some of whom who came
from as far away as: Mauritius, the Netherlands, Germany and Lancashire,
Ponsonby spotted the lad pedalling furiously over the bridge. Off we
headed to the Bristol Marriott Royal Hotel where Harry’s bicycle was
parked outside while he visited his mother, Maisie, a waitress in the
Palm Court restaurant.

Everyone got back off the bus to enjoy coffee and a talk by the author.